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Passive Lakland 55-02

I'm looking to convert my Lakland 55-02 to a straight-up passive bass. Anyone have any experience with the Bartolini Quad pickups compared to the Nordstrom stuff? The MM pickup is more of a concern to me than the Jazz pickup. I'll be replacing both obviously. I will be removing the preamp, so I'm looking for something that works well in this fashion. Any thoughts would be appreciated.
 
The Lakland 55-02 pickups are very, very good pickups. The MM-style 55-02 bridge pickup was designed by Bill Bartolini specifically for the 55-94/55-02. The Lakland J-style neck pickup is a Barto 59CBJD-LN3 (bright classic) with some extra windings.

Bartolini designs their pickups for good tone, precision, accuracy of response, rather than for output volume. And like all Bartos, the 55-02 pickups really are NOT very loud compared to my other basses.

If it really annoys you so much to have to pull the volume knob up to get passive mode, it'd be easy to just reverse the switch connections so that down is passive & up active, or to permanently bypass the preamp without having to remove the preamp.
 
I spoke to Lakland today. They told me the pickups were designed to be paired with a preamp. Although they would work passive, they are very low output. They suggested I dont remove the preamp with the stock pickups. My issue is I have a DJ5 that I love the sound of, but I like the way this one plays. I wish I could get the passive sound out of this bass. I know people will tell me that is why they make different models, I simply like the tone of the passive pickups better.
 
Why not just pull out on the volume knob? (Or if you really want to remove the electronics, just do that; remove the preamp and EQ pots, and re-wire; replace the volume knob with a plain one if you want) The output will be a bit low as you say, but it's not heinous; just increase amp vol.

Something about this query isn't making sense to me. What is your goal? I believe it is an X/Y problem. I own a 44-02, and it's fine as active or passive. Passive is quieter (Until you raise the volume elsewhere in your signal chain), and loses the tone controls; not much of a difference other than that.
 
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Stated another way: What is "the passive sound", to you? Nothing you are proposing will risk ruining your bass, so follow your heart on this. You will learn things, and will only be down a few $hundred USD on PUs if you do replace them. Do bear in mind that you are considering replacing the PUs which ship standard on $5k USD basses. This is interesting in that this specific bass, unlike some active ones, make it trivial to turn it passive using the knob. And the electronics cavity is straightforward.

For context, I own two basses; both are active. One is the 44-02; the other is a SR5. The SR5 cannot practically be turned passive both because it doesn't have the knob disable, and because it's a pain to get to the electronics, and the pots are soldered onto a single PCB that runs through the cavity. The Lakland, by contrast, has a simple 4-screw panel, a small SMT PCB for the preamp, and dedicated pots/components that can be treated a-la-carte. Doable mod? Yes. Do you need to replace the pickups? No if you can turn the gain up on your amp, DI, etc. Unnecessary? Yes IMO, other than the learning value.

I have been farting around a lot with the electronics in my 44-02 to diagnose a problem. TY Lakland for making this design simple. Spears to MM for making it a PITA! If you do end up doing wiring mods, you may have an easier time removing the pots from the front of the bass prior to soldering.
 
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Being that the original thread was 4 years ago, heres what I ended up with. I did in fact remove the active electronics...for a minute. Ended up putting them back in. Tried a Nordstrand set of pickups, didnt like them (I dont even remember why). Put the originals back in and started to get used to dialing in the bass from a stock condition. I still have the bass and still use it today, just as it shipped from Lakland.

The most interesting thing that happened though during this experimental stage was unexpected. I spent the last 15 years playing in top 40 high energy bands here in Detroit. During this time, I played Spector, Music Man ,Fender and Lakland basses. I used many different amp setups, Mesa, Fender, GK, Ampeg, etc. I also used a multitude of bass DIs (you name it, I tried it). I also used in ear monitors the whole time. 64 Audio N8s. None of my gear was ever considered junk or inferior stuff. I struggled BIG TIME with my tone. Finally after all the years, I stopped playing with these groups that had to sound like the record. I started my own project and low and behold, my tone came back. I was very happy. what changed? I was no longer playing along with backing tracks. As soon as they were gone, everything opened up. They were stepping on my space.I realize that its very common to use them, many do, and the type and quality of them probably make a huge difference. But when they were gone, I found my voice again.